XDBM is an XQuery implementation on the W3C's EXI binary XML format.
XDBM version 2 will be an XQuery implementation that uses EXIP to handle binary XML in the EXI format adopted by the W3C. It will, like EXIP, aim to be as small as possible so that it runs well on resource constrained devices. It is still in the project design stage.
X2S is a very simple DOM parser. The aim is to retrieve attributes and text-values from an XML DOM document in the case that you don't need all features and complexity of XPath and/or XQuery. For example, if it could be useful a method to retrieve all text-values from a DOM relative path like:
/root-node/persons/person/name
or the attributes from a string like:
/root-node/persons/person/id